Dual functional passivating layer of graphene/TiO2 for improved performance of dye-sensitized solar cells

Shahid, Muhammad Umair; Mohamed, Norani Muti; Muhsan, Ali Samer; Khatani, Mehboob; Bashiri, Robabeh; Zaine, Siti Nur Azella; Shamsudin, Adel Eskandar

doi:10.1007/s13204-018-0685-0

Cited by 21 publications

(3 citation statements)

References 56 publications

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“…The D peak belongs to the breathing mode of sp2 carbon atoms, while its intensity relates to the degree of existing defects. The G peak corresponds to the doubly degenerate E2g phonon dispersion at the Brillouin zone center, its intensity and sharpness are attributed to the sp2 hybridized graphitic structure [37]. The 2D peak is the second-order Raman scattering process, originating from in-plane vibrational modes of carbon atoms.…”

Section: Physiochemical Properties Of Nano-additivesmentioning

confidence: 99%

Thermophysical Properties of Silver/Graphene Hybrid Nanoparticles Reinforced Ethylene Glycol– Glycerol Mixture Based Nanofluids

Zaaba,

Muhsan,

Nasif

et al. 2024

Preprint

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Graphene nanoplatelets (GNPs) based cooling nanofluids have attracted tremendous attention due to low cost and high thermal conductivities. However, GNPs are not stable in common base fluids without proper surface treatments or surfactants. These surfactant or surface treatments impede the potential thermal conduction of GNPs. Several studies have addressed this issue by hybridizing GNP-based nanofluids with different highly thermal conductive materials to overcome that loss of thermal conduction. Besides carbon materials, metal nanoparticles still have higher potential thermal conductivities. Amongst high-conductive metal nanoparticles, silver has the highest proven thermal conductivity and stability. On the other hand, regarding extreme weather or specific industrial conditions ethylene glycol as base fluid has been mostly used, however, it has serious toxicity and environmental concerns. Therefore, in the current work, being the highest conductive and stable metal, silver nanoparticles have been incorporated with GNPs, and the binary mixture of ethylene glycol and glycerol in a ratio of 40:60 has been selected as less toxic and compatible with extreme conditions. The thermophysical properties are optimized based on different GNPs/Ag concentrations. Results showed that at 0.1 vol% of GNPs/Ag nano-additives, the thermal conductivity was significantly increased (102.85%) as compared to the base fluid. The zeta potential was remarkably increased (~100%) after adding T-80 surfactant to the 0.1 vol% GNPs/Ag hybrid nanofluid even after 7 days, where it recorded 35.2 mV compared to 15.7 of that without surfactant. Moreover, a minor increase of 19.84% in viscosity with 0.1 vol% GNPs/Ag hybrid nanofluid was noted relative to the base fluid. The reported hybrid nanofluids have shown potential usage as a cooling fluid in extreme thermal conditions.

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Section: Physiochemical Properties Of Nano-additivesmentioning

confidence: 99%

Thermophysical Properties of Silver/Graphene Hybrid Nanoparticles Reinforced Ethylene Glycol– Glycerol Mixture Based Nanofluids

Zaaba,

Muhsan,

Nasif

et al. 2024

Preprint

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“…Recently, numerous studies have been reported on the use of CP-based composite materials, especially PANI and CNs of the type CNTs, graphene, and their derivatives or hybrids, resulted from the combination of the two, in a wide range of applications, in particular, as EMs in DSSCs [ 16 , 20 , 22 , 24 , 60 , 62 , 68 , 81 ] and supercapacitors [ 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 ]. In the composite configuration, the two components, i.e., CP and the carbon-based material, make their main contribution, the former through chemical stability, mechanical resistance, and redox behavior (PEDOT, PANI) and the latter through conductivity character and a high specific surface area.…”

Section: Synthesis and Vibrational Properties Of Cps-cns Composites A...mentioning

confidence: 99%

Functionalization of Carbon Nanotubes and Graphene Derivatives with Conducting Polymers and Their Applications in Dye-Sensitized Solar Cells and Supercapacitors

Văduva,

Burlănescu,

Baibarac

2023

Polymers

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Recent progress concerning the development of counter electrode material (CE) from the dye-sensitized solar cells (DSSCs) and the electrode material (EM) within supercapacitors is reviewed. From composites based on carbon nanotubes (CNTs) and conducting polymers (CPs) to their biggest competitor, namely composites based on graphene or graphene derivate (GD) and CPs, there are many methods of synthesis that influence the morphology and the functionalization inside the composite, making them valuable candidates for EM both inside DSSCs and in supercapacitors devices. From the combination of CPs with carbon-based materials, such as CNT and graphene or GD, the perfect network is created, and so the charge transfer takes place faster and more easily. Inside composites, between the functional groups of the components, different functionalizations are formed, namely covalent or non-covalent, which further provide the so-called synergic effect. Inside CPs/CNTs, CNTs could play the role of template but could also be wrapped in a CP film due to π–π coupling enhancing the composite conductivity. Active in regenerating the redox couple I−/I3−, the weakly bound electrons play a key role inside CPs/GD composites.

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“…Completely new, unexpected fields of application of transgraphenes and their derivatives are being proposed [153][154][155][156][157][158]. For instance, a material such as borophene is predicted to serve as an effective energy storage and also may form nanotubes analogous to those of graphene, which may have even higher electrical conductivity that suggests the possibility of their use as contacts and interconnections in nanodevices [91].…”

Section: Brief Outlook Into the Perspectives Of Single-element 2d Mat...mentioning

confidence: 99%

Single-Element 2D Materials beyond Graphene: Methods of Epitaxial Synthesis

et al. 2022

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Today, two-dimensional materials are one of the key research topics for scientists around the world. Interest in 2D materials is not surprising because, thanks to their remarkable mechanical, thermal, electrical, magnetic, and optical properties, they promise to revolutionize electronics. The unique properties of graphene-like 2D materials give them the potential to create completely new types of devices for functional electronics, nanophotonics, and quantum technologies. This paper considers epitaxially grown two-dimensional allotropic modifications of single elements: graphene (C) and its analogs (transgraphenes) borophene (B), aluminene (Al), gallenene (Ga), indiene (In), thallene (Tl), silicene (Si), germanene (Ge), stanene (Sn), plumbene (Pb), phosphorene (P), arsenene (As), antimonene (Sb), bismuthene (Bi), selenene (Se), and tellurene (Te). The emphasis is put on their structural parameters and technological modes in the method of molecular beam epitaxy, which ensure the production of high-quality defect-free single-element two-dimensional structures of a large area for promising device applications.

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Dual functional passivating layer of graphene/TiO2 for improved performance of dye-sensitized solar cells

Cited by 21 publications

References 56 publications

Thermophysical Properties of Silver/Graphene Hybrid Nanoparticles Reinforced Ethylene Glycol– Glycerol Mixture Based Nanofluids

Thermophysical Properties of Silver/Graphene Hybrid Nanoparticles Reinforced Ethylene Glycol– Glycerol Mixture Based Nanofluids

Functionalization of Carbon Nanotubes and Graphene Derivatives with Conducting Polymers and Their Applications in Dye-Sensitized Solar Cells and Supercapacitors

Single-Element 2D Materials beyond Graphene: Methods of Epitaxial Synthesis

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